<?php
	header("Content-Type: text/html; charset=utf-8");

	//引用
	require_once 'class/mysql.class.php';
	$db = new mysql();
	
	//防止注射，保护服务器安全 
	$sql_one = "select * from php_users where user_id =2";
	$result = $db->inject_check($sql_one);
	print_r($result) ;